Relay Pumping - Got Big Water

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Relay Pumping
In-Service Drill
4-inch Hose Relay
Montgomery County Fire and
Rescue Service
2007
© 2008, GBW Associates, LLC Westminster, Maryland
Background
• The Montgomery County Fire and
Rescue Service runs an In-Service
Training Program that uses
different “real life” scenarios to help
keep company level personnel
operationally ready to perform.
• The Summer 2007 session of the
In-Service program focused on
establishing a relay pumping
operation from a municipal water
supply.
• The incident simulated a propane
release where a 500 gpm
sustained flow was needed to
control the incident.
© 2008, GBW Associates, LLC Westminster, Maryland
1st Arriving Engine
The 1st arriving engine deploys a TFT Blitzfire line
and has initiated a layout of 4-inch supply line.
© 2008, GBW Associates, LLC Westminster, Maryland
The Engine Driver
The engine driver plays a critical role in getting this
operation starting. He is responsible for getting
everything up and running and water flowing.
© 2008, GBW Associates, LLC Westminster, Maryland
The Crew
The crew works to get the attack line in place and
ready to accept the water from the engine.
Coordination is the key term in this operation.
© 2008, GBW Associates, LLC Westminster, Maryland
TFT Blitzfire – 500 gpm
Many MCFRS engines carry a TFT Blitzfire. These
devices have been deployed and successfully used
on a number of large fires.
© 2008, GBW Associates, LLC Westminster, Maryland
Attack Engine
Engine 716 (1250 gpm) operates as the attack
engine and is being fed through its 4-inch supply line.
© 2008, GBW Associates, LLC Westminster, Maryland
Relay Pumper
Engine 715 (1500 gpm) is the next pumper in the
relay operation and is pumping to Engine 716.
© 2008, GBW Associates, LLC Westminster, Maryland
Hose Layout
The hose layouts between the pumpers were short
(600 ft) in terms of traditional relay operations, but it
was concept that was being practiced.
© 2008, GBW Associates, LLC Westminster, Maryland
4-inch LDH
The newer, lightweight fabric LDH seems to be much
easier to maneuver and work with on the fire scene.
© 2008, GBW Associates, LLC Westminster, Maryland
2nd Relay Pumper
Engine 712 (1250 gpm) is the second relay pumper
and is shown here feeding E715’s supply line.
© 2008, GBW Associates, LLC Westminster, Maryland
Elevation
Engine 712 is pumping up a slight grade to E715.
Elevation is one of the items that an engine driver
must consider when calculating his discharge
pressure.
© 2008, GBW Associates, LLC Westminster, Maryland
Hose Layout
This photo shows the layout between the 2nd Relay
Pumper and the Water Supply Pumper which is
connected to a hydrant.
© 2008, GBW Associates, LLC Westminster, Maryland
Water Supply Pumper
Engine 724 (1250 gpm) operates as the water supply
pumper and uses a “heavy water” hook-up on the
hydrant.
© 2008, GBW Associates, LLC Westminster, Maryland
Heavy Water Hook-up
The Humat valve on the steamer outlet and a ¼-turn
ball valve on the 2-1/2 outlet make up the Heavy
Water Hook-up.
© 2008, GBW Associates, LLC Westminster, Maryland
Heavy Water Hook-up
This photo shows the typical hose layout for the
heavy water hook-up. This hook-up allows the
pumper to have access to additional water in the
hydrant.
© 2008, GBW Associates, LLC Westminster, Maryland
Heavy Water Hook-up
Another shot of the heavy water hook-up.
© 2008, GBW Associates, LLC Westminster, Maryland
High Flow Discharge
Many of the MCFRS pumpers have a designated
high-flow discharge specifically designed to support
LDH operations.
© 2008, GBW Associates, LLC Westminster, Maryland
Water Flow Starts
Meanwhile, back at the attack engine once the relay
is completed, water flow is started.
© 2008, GBW Associates, LLC Westminster, Maryland
Water Flow
The company officer remains in control of the water
flow operation having to supervise both his crew
while being ready to also support the engine driver if
needed.
© 2008, GBW Associates, LLC Westminster, Maryland
Flow Increase
With the relay up and running, additional water was
determined to be available and the flow is bumped
up to 1000 gpm.
© 2008, GBW Associates, LLC Westminster, Maryland
Additional Lines
With the relay running, additional crews arrive at the
attack engine and man additional attack lines.
© 2008, GBW Associates, LLC Westminster, Maryland
Facts & Figures…
• A relay pumping operation is not a
common operation for many FDs.
• Pumping relays take time to build
and are really dependent upon the
arrival times of the pumpers and
the size of their pumps.
• The important factor is the
capability of the supply hose.
Fittings and adaptors are critical to
the success of the operation.
• The relay pumping operation
shown in this presentation took 14minutes to set-up and sustained a
flow of 1000 gpm.
© 2008, GBW Associates, LLC Westminster, Maryland
This program was developed by
GBW Associates, LLC
© 2008
No part may be used or copied
without expressed written consent.
For more information contact us at
[email protected]
© 2008, GBW Associates, LLC Westminster, Maryland